Back for brake-shoes.



FITZ WILLIAM SARGENT.

BACK FR BRAKE SHOES.

ritiraN srariis ai? r rein.

rI'rz WILLIAM snnenlv'r, oFMArIWARNEW JERSEY, assrefnon 'ro AMERICANBRAKE I sIIoE a FoUNDnY'cor/IPANY, or lvrarrwan, New .Innsnrj AconronArIoiv or New JERSEY.

Liconsa.

` i VBAVJK'F011, BRAKE-SHOES.

Specification of Letters Patent. PQLQHQd NV, 16, 1%15.

appiiaabn inea august as, 1915. serial No. 47,770.

To aZZwLom z'ma/ concern.' n. n

Be it known that I, Fira WILLIAM ySan- GnN'r, a citizen of the United`States, and a resident ofMahwah, in the county` oflBergen and State ofNew vJersey, have `made and invented certain new and useful Improvementsin lBacks forBrake-Shoes, of which the following is a specification.y

This invention relates to reinforcing backs for brake shoesand has foritsobjeet to `so design the back thata wrought metal lug may besecuredthereto, and Iin suchA manner that the ends of the lug `.vill notproject below the general plane of theback. It has been the customarypractice, heretofore, to attach a wrought metal lug to the brake shoeback by bending the ends thereof `beneath and into Contact with thelower,-surface of the back, which causes the ends of the lug to protrudebeneath the general plane of the back and within the wearing body of theshoe. As the body of the shoe becomes worn, the ends of the wroughtmetal lug would be severed, allowing it to pull out and the brake shoeto fall away from the brake head. ln some instances, this difficulty wasovercome by crimping the central ,portion of the back and turning theends of the lug into this raised crimped portion. f The crimping of theback, however, is liable to be attended by the permanent injurylthereto.y

lt is therefore, the purpose of the present invention todo away withthiscrimping of the back, and at the same time to dispose the ends of thewrought metal lug, either in` or above the general planeof the back andsecurely anchor it thereto, so that the reinforcing back may be entirelyworn away. before the ends of the lug become severed,land with these andother objects and advantages, mv invention resides in the combinationand arrangement of parts and in the details of construction hereinafterdescribed and claimed, wherein it is to be understood that changes inthe precise embodiment of the invention can be made within the scope ofwhat is claimed without departing from the spirit thereof.

The preferred embodiment of my invention is disclosed in theaccompanying draw ings, wherein Figure 1 is a view in plan of a blankfrom which the reinforcing back, embodying the characteristic featuresof my invention, is

formed. Fig. 2 is a view in cross-section taken on the line 2-2 of Fig.l, and after the blank, has been curved in its length. Fig. 3 is asimilar view, with the notched sides ofthe back upwardly turned or bent,for the receptionand securement of the ends ofthe wrought metal lug.Fig. et is a fragmental view in perspective of the finished back, withthe wrought metal lug attached thereto. Fig. 5 is a viewin central vertical section of a brake shoe having my im-y proved reinforcing backincorporated therein. Fig. "o isa ,similar view of a somewhat slightlymodified form of wrought metal lug. Fig. 7 is a fragmental view in planof a modified form of blank; and Fig. 8 is a vview in central verticalsection of a brake shoe with the modified form of reinforcing backembodied therein.

Referring specifically to the several views, the blank illustrated in Fig. 1 includes the oblong body or plate 10, in which .are providedlongitudinally extending openings 11, these openings being adapted toreceive the molten metal of the cast body of the shoe therein` andincrease the anchorage therefor. rPhe plate 10 is provided withtransversely extending slits 12, the same being of Vlimited lengthandextending inward'from the sides of the plate. These slits are arrangedin pairsv upon opposite sides of the plate and are disoosedsymmetrically about thetransverse medial line thereof, and as thusarranged, .deiine flaps 13 upon opposite sides of the `plate 10. 1Thefiaps are provided with the 'slots or recesses 141i, which extend in thedirection of the length of the plate 10, and after theflaps `have beenupwardly or outwardly turned, as illustrated in Fig. 3, form openingsfor the reception of the ends of the wrought metal lug 15. The blank, bythe action of suitable forming dies, or other means, is bent and curvedin its length, and the flaps 13 are turned upwardly above the convex orouter face thereof. A wrought metal lug 15, which is U-shaped incrosssection, is secured to the reinforcing back by bending the ends 16through the open ings 14, the ends extending one toward the other andtransversely of the reinforcing back. The wrought metal lug is,therefore, securely clamped to the reinforcing back, and is permanentlyanchored in such relation by the body 18 of the shoe, which is and lugin the customary manner, itbeing noted in this connection that the lugis spoken of asA being of wrought metal in contra-distinction to lugsformed of cast metal and integral with the body. The cast metal of thebody of the shoe flows around and above the sides of the lug 15 so'as tosupplement the same and present the requisite bearing area for the brakehead.

yThe somewhat modiiied form of reinforcing lug 20,illustrated in Fig.dissimilar tothe foregoing, with the exception that the ends 19 thereofare'turned or bent in opposite directions so that the sides of the lugare embraced between the flaps 13'of the back,and thevendsthereofproject oppositely through the openings 141 therein. In thisform, as in the previous form, the cast body 18 of the shoe extendsabove thereinforcing lug and supplements the same, as well aspermanently anchoring the lugV in position. Y- 1 The somewhat modified`form of reinforcing back, illustrated in Figs. 7 and 8,1'esides in theforming of the flaps 23 Vcentral of the blank rather than at the sideedges thereof. This construction is accomplished by providing theblanklO with the H-shaped slots 22, and the resulting flaps 23 are bentoutward and above the plane of the back. These flaps are provided withthe recesses Vor openings 14, and into which the endsV 16 of the lug 15are bent. The centrally disposed opening, formed by the removal ofthefflaps, receives the molten metal of the body therein and increasesthe anchorage thereof. Y i

-In service, the reinforcing back of the shoe and body may be worncompletely away before the securing ends of the lug willbe severed, sothat all danger and likelihood of the ends of the lug becoming worn andthe lug pulling away fro-m the shoe'is elimi-r nated. lThis securementof the lug V renders unnecessary the crimping or bridging of the centralportion of the back,'so that there vcan f be no chance of the backbecoming fractured or weakened by such procedures. f

What I claim is Y 1.V A reinforcing back for brake shoes provided at itscentral portion with outwardly extending iaps, a wrought metal lug, withthe ends thereof interlocking with the said iaps. y

2.Y A reinforcing backfor brake shoes with outwardly extending flapsformed integral therewith, and a wrought metal lug with Y,

vformed integral therewith, rand having recesses'therein extending inthe direction of the length of saidback, and alug, with the ends`thereof projectingl into and anchored within saidopenings.A v i r, 5. Areinforcingback uniformly curved throughout its length, a, wrought`metal lug,

and means formed integral with vsaid back extending outwardly therefromand engaging ,the ends of said lug, the ends of said lug being disposedabove theplane of said back.

back provided at its'ce'ntral portion with outwardlyturned flaps, saidflapsrprovidedV with openings therein, a lug extending above 6. A brakeshoe comprising Aa reinforcing and across saidbackand with'the endsthereof disposed within the openings in said flaps, and a wearing bodyanchored to said 4back and said lug. Y

`Signed at Mahwah, in the county of Bergen and State of New Jersey, this25th Vday i' of AugustA. D. 1915.

Y Y FITZV WILLIAM SARGENT. Y

1Witnesses: Y R. C. AUGUR,

Gr. T. STUART.

Copies of this patent may be obtained Yfor vel cents each, by addressingthe Commissioner of Patents.,

Washington, D. C. Y

